Question 31 from the Impossible Quiz 2 asks "How do you get two whales in a car?", with the potential answers being "1 in the front, 1 in the back", "You don't", "Drive down the M4" and "You're an idiot!".

The answer in this case would be "Drive down the M4", since the words "two whales" are a pun on "to Wales", and the M4 is a motorway that connects London with South Wales in the UK.